Method for manufacturing surface-modified fluororesin film, method for manufacturing rubber composite, and rubber product

Abstract

There are provided a method for manufacturing a surface-modified fluororesin film capable of long-term inventory storage, a method for manufacturing a rubber composite composed of the surface-modified fluororesin film and rubber bonded together, and a rubber product for medical use made of the rubber composite. The method for manufacturing a surface-modified fluororesin film comprises the step of performing surface roughening on a fluororesin film RF by applying an ion beam from an anode layer ion source to the surface of the fluororesin film RF. A rubber is placed over the roughened surface of the thusly produced surface-modified fluororesin film, and, through vulcanization molding process, the surface-modified fluororesin film and the tuber can be firmly bonded to each other.

The invention claimed is: 
     
       1. A method for manufacturing a surface-modified fluororesin film comprising the step of:
 performing surface roughening on a fluororesin film by applying an ion beam at an irradiation voltage of 1.5 kV or more and 3.5 kV or less from an anode layer ion source to a surface of said fluororesin film. 
 
     
     
       2. The method for manufacturing the surface-modified fluororesin film according to  claim 1 ,
 wherein said fluororesin film is made of any one of PTFE, denatured PTFE, PFA, and ETFE. 
 
     
     
       3. A method for manufacturing a rubber composite comprising the steps of:
 performing surface roughening on a fluororesin film by applying an ion beam at an irradiation voltage of 1.5 kV or more and 3.5 kV or less from an anode layer ion source to a surface of said fluororesin film; and 
 placing a rubber over said surface of said fluororesin film and bonding them together by means of vulcanization molding. 
 
     
     
       4. A rubber product comprising:
 a fluororesin film; and 
 a rubber, 
 said fluororesin film having its surface roughened by irradiation of an ion beam at an irradiation voltage of 1.5 kV or more and 3.5 kV or less from an anode layer ion source, 
 wherein said rubber is placed over the roughened surface of said fluororesin film, and, through a vulcanization molding process, said rubber finds its way into the roughened surface of said fluororesin film so as to adhere tightly to said fluororesin film under an anchor effect.